Lock attachment for doors



Oct- 27,1925. 1,558,917

J. D. PERKINS Locx ATTACHMENT FOR noons- Filed Feb. 19. 1925 Patented Oct. 27, 1925. V

UNITED STATES,

JEFF DAVIS PERKINS, or JACKSONVILLE, rLonInA. I A

L001: ATTACHMENT FOR noons.

Application filed February 19, 1925. Serial no. 10,271

T all whom it may concern:

Be it known that I, J Davis PnRKINs,

. a citizen of the United States, residing at Jacksonville, in the county of Duval and State of Florida, have invented certain new and useful Improvements in a Lock Attachment for Doors, of which the following is a specification. V

The present invention appertains to a lock attachment for doors and aims to provide a device which will allow thedoor to be held ajar and when so held, will prevent persons on the outside thereof from swinging the door to a full open position.

Another important object of the invention is to provide an attachment of this nature which has means incorporated therein whereby the device for holding the door ajar may be actuated from the outside when such is desired.

A further important object of the invention is to provide an attachment of this nature which may be easily installed at a relatively low cost, one which is simple and efiicient in construction, reliable in operation, P

inexpensive to manufacture, strong, durable, and well adapted to the purpose for which it is designed.

With the foregoing and numerous other objects in view as will appear as'the description proceeds, the invention resides in certain novel details of construction, and in the combination and arrangements of parts as will be hereinafter more fully described and claimed- In the drawing Figure 1 is a sectional view through a door frame showing the attachment holding the door ajar,

Fig. 2 is an enlarged detail end elevation of the bottom portion of the door with portions of the attachment associated therewith, and

Fig. 3 is an enlarged detail section through the door and a portion of the attachment mounted therein.

Referring to the drawing in detail it will be seen that 1 designates a door frame with a door 2 hinged therein in the usual manner. A ratchet plate 3 is embedded in the floor on the inside of the door frame, a slight distance therefrom. A pawl member 4: is pivoted on a bracket 5 at the lower portion of the door on the inside thereof and a chain 6 is attached to the free end of the pawl 4.

V A ratchet plate 7 is provided with end arms 8 and 9 which are attached to the inside and outside of the upper portion of the door'frame 1 so that theplate 7 extends above the door 2. A ratchet member 10 is fixed to the upper edge of the door-for lengagement-with the plate 7 when the pawla is engaged with the ratchet plate 3 and an effort is made to further'open the door, because this will cause theldoor to raise and engage the ratchet member 10 with the ratchet plate 7, thus positively preventing the door from being fully opened.

A casing 11 is extended through the door 2 and is provided at its outer end with a flange 12 which is adapted to be embedded in a recess provided on the outer surface of the door. The bore of this casing 12 is restricted adjacent its front end so as to provide a shoulder 13. A bolt 14 is slidable through the bore of the casing 11 and is provided at its front end with a knob 15 having an inwardly extending projection 16 adapted to fitor extend in an opening 17 rovided in the flange 12. A spring 18 is disposed within the casing 11 above the bolt 14 so that one end impinges against the shoulder 13 and the other end against the knob 15. The inner end of the bolt 14: has

an eye 20 which is engaged by the chain 6.

projection 16 is fully extended into the opening 17 at which time the pawl 4: is in engagement with the ratchet plate 3 so that pin 24 may be inserted through the openings 21 and 22 for holding the parts in this position and preventing the lifting of the pawl 4 from the outside of the door.

It is thought that the construction and operation of the invention as well as its advantages will now be clearly understood without a more detailed description. It is desired, however, to point out that numerous changes in the details of construction, in the combination and arrangement of parts, may be resorted to without departing from the spirit or. scope of the invention as herein after claimed or sacrificing any of its advantages.

Having thus described my invention, what I claim as new is 1. In combination, a door, a pawl pivoted to the bottom portion of the door, a bolt slidable through the door, a chain connected to the bolt and to the free end of. the pawl, means for holding the bolt against the movement in the door, and means upon the release of the first mentioned means for normally projecting the bolt from the door so that it may be manually engaged to lift the chain so as to hold the pawl in a nonengaging position and when released will function as a weight for retaining the pawl in said non-engaging position.

2. A device for operating a pawl pivoted to a door including acasing having a bore extended therethrough with a shoulder formed therein, a flange provided on one end of the casing and having an opening therein, said casing provided with a pair of oppositely disposed openings, an operating bolt adapted to be attached to the pawl and slidable through the, casing and provided with a head having a projection adapted to extend into the opening of the flange, said bolt provided with an opening adapted to register with the openings in the casing when the projection of the knob is fully disposed in the operation of the flange, a pin projectable through the openings in the casing and the opening in the bolt, and a spring in the casing impii'iging against the shoulner and against the knob and held under compression when said pin is projected through the openings in the casing, and the opening in the bolt.

In testimony whereof I affix my signature.

JEFF DAVIS PERKINS.

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